High-voltage thyristor conversion/inversion apparatus

Abstract

The invention relates to a high-voltage thyristor conversion/inversion apparatus wherein alternating current supplied from A.C. buses (R), (S), (T) is converted into direct current through bridge-connected valves (U)-(Z), and direct current supplied from D.C. buses (P), (N) is inverted into alternating current. To the end of eliminating problems in reducing the area of the site of an A.C.-D.C. converting/inverting station still more, among the valves constituting a bridge, those (U), (V), (W) or (X), (Y), (Z) of each portion of three arms to be connected to the D.C. bus (P) or (N) of identical sign and lightning arresters (LA1), (LA2), (LA3) or (LA4), (LA5), (LA6) connected in parallel with the respective valves are received in a single sealed tank (TA), thereby to scale down the whole conversion/inversion apparatus. The apparatus is used in the A.C.-D.C. converting/inverting station.

What is claimed is: 
     
       1. In a high-voltage thyristor conversion/inversion apparatus wherein a bridge circuit is constructed of valves of six arms and lightning arresters which are connected in parallel with the respective valves; a high-voltage thyristor conversion/inversion apparatus characterized in that the valves and lightning arresters of each portion corresponding to three arms, which are connected to a DC bus of identical sign, are received in a single sealed tank; wherein said valves are arranged concentrically at equal intervals in said sealed tank and wherein said lightning arresters each of which is disposed on one side of the corresponding valve are arrayed in a straight line.